00512naa#a2200169#i#4500001001400000005001700014011001400031100004100045101000800086102000700094200011900101210004900220215001000269608002700279700002200306856001400328EN\\bibl\108520250225223954.2##a2073-0462##a20140113b2014####ek#y0engy0150####ca0#aRUS##aRU1#aSpring wheat productivity forecasting  in the forest steppe zone of Volga by least squares methodeJournal article1#aKazancKazan state agrarian Universityd2014##a6 с.##aJournal article2local#1aAvvakumovgOleg  4#azh-szf.ru